Bug 24904: Speed up installer process - 1 query per table

Bug 24904: Speed up installer process - 1 query per table

Since bug 13897 we are using YAML file to store the installer data.
We are generating/executing 1 query per row, which is much more slower than before.
We should generate 1 query per table to get back to the previous execution time.

With this patch we are going to generate a single one big SQL query per
table.

Test plan:
1/ Checkout a commit before bug 13897:
git checkout -b before_13897 0706922221dcdf9fa8ed7fcf86245c5622f33a3c
2/ Execute the following commands (several times, to get a median!):
mysql -h db -u koha_kohadev -ppassword -e"DROP DATABASE koha_kohadev";
mysql -h db -u koha_kohadev -ppassword -e"CREATE DATABASE koha_kohadev";
koha-shell -p -c "perl benchmark_installer.pl sql" kohadev;
Note the different times displayed in the output, especially the first 2
installer/data/mysql/en/marcflavour/marc21/mandatory/authorities_normal_marc21.yml
installer/data/mysql/en/marcflavour/marc21/mandatory/marc21_framework_DEFAULT.yml
They are the number of seconds took to insert them
3/ checkout master
git checkout -B master origin/master # Will reset your master branch!
4/ Execute the previous commands but without the 'sql' parameter passed
to the benchmark script
mysql -h db -u koha_kohadev -ppassword -e"DROP DATABASE koha_kohadev";
mysql -h db -u koha_kohadev -ppassword -e"CREATE DATABASE koha_kohadev";
koha-shell -p -c "perl benchmark_installer.pl" kohadev;
Note the different times.
5/ Apply this patch and retry 4

Please post the execution times when you signoff on this patch.

Spoiler: total time goes from 21s to 4s.
marc21_framework_DEFAULT.yml from 12s to .5s

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
My numbers, 99.99% confidence

3.906 ±0.252    SQL files
15.516 ±0.772   YAML wo/patch
3.324 ±0.193    YAML w/patch

Very good!

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>